There is nothing Alice can do to completely stop her Alzheimer’s from progressing, and one of the many cruelties of this situation is that she is aware that it means she’ll lose her identity to a disease. More importantly, it means she will have to be the one who calls it quits on certain elements of her personality. This is particularly true of her identity as a Harvard professor: due to her tenure, she cannot be fired, so she will have to be the one to give up her position before her symptoms prevent her from being a good teacher.